Patents by Inventor Yogi C. Agrawal

Yogi C. Agrawal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for measuring particle velocity using differential photodiode arrays
    Patent number: 4725136
    Abstract: A method for measuring the velocity of a scatterer in a moving fluid by examining the spatial structure of the optical field on the detector of a Laser Doppler Velocimeter (LDV). The optical field after scattering from the laser beam is a traveling wave of a shape dependent on the detector optics alone. A pair of differential linear arrays are used to find the direction of velocity of the traveling wave and hence that of the scatterer. Furthermore, this method eliminates the Doppler pedestal which requires high pass filter in most of the conventional methods.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: February 16, 1988
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: James R. McCullough, Yogi C. Agrawal